package string;

public class CaseDemo {
    public static void main(String[] args) {
        String str = "I LIKE JAVA";
        System.out.println(str.toLowerCase());
        System.out.println(str.toUpperCase());
        String str2 = "I LOVE YOU";
        System.out.println(str2.toLowerCase());
        System.out.println(str2.toUpperCase());
    }
}
